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Message: <blockquote data-quote="888" data-source="post: 402181" data-attributes="member: 13977">I heard from a friend who owns a very reputable workshop that if you run Ron 95 on your cars, the carbon build up in the engine would be very bad thus requiring atleast a top overhaul after sometime. He has personally taken the engine out of one of his car which has been using ron 95 and inside the whole head was black ! You couldn't see any silver at all. He had to clean everything and then chose to overhaul the entire engine. BMW said that our cars require atleast 91 octane but you'll never know what's the true octane level is in Malaysia since they always sell the good stuff overseas and leave us with the shitty stuff. I don't know about you guys, but I wouldn't risk my engine for a few ringgit a tank.</blockquote>